The same vehicle (same drivetrain etc.) will be rated for two very different towing capacities in the U.S. vs. Europe, with the European one being quite a bit higher.

E.g., Volvo XC40 T5 is 1600 kg in the U.S. https://www.volvocars.com/en-ca/support/car/xc40/21w22/artic...

but 2100 kg in the UK https://www.volvocars.com/uk/support/car/xc40/21w46/article/...

As I recall it has to do with standards for stability at speed...

All to say you can probably tow more than you think with a U.S. car that's also sold in Europe, just maybe don't go above 55mph...?